GridWeb.ImportExcelFile throws exception "Object reference not set to an instance of an object"

Aspose.Cells Product Family
43

Hi,
We’ve successfully integrated the grid component in our application and its already in live. We got an issue from one of our client. He faced problem in loading and working with the attached excel file. The page takes un-acceptable amount of time to load and sometime the browser hangs. Even if the page loaded successfully after several timeouts, user gets very annoying experience while editing cells.

The excel file contains formulae in the hidden sheet ‘ValidationData’.

Can you please investigate the issue ASAP?

Thanks.
Wahid

44

Hi,

I have tested to load your file to
GridWeb using our latest version v2.5.2.200x and found the issue as you have mentioned.

I have logged your issue with an id: CELLSNET-26523. We will look into it soon.

Thank you.

45

Hi,

We have tested “800 Entity.xls” using AutoExtendMaxRowColumn = false. The loading speed is faster.

Please refer to: https://forum.aspose.com/t/131989

Alternatively, you can try to use EnablePaging option.

We are implementing loading gridweb asynchronously. This will enhance the performance much on client side. It will take about 2-3 weeks.

Currently, you can try the options above.

46

Hi,

We have implemented the feature of loading data asynchronously in Aspose.Cells.GridWeb v2.5.3.2001. There is an attribute named “EnableAsync” to specify whether to enable to load data asynchronously.

Note: It is not available when using one of NoScroll, EnablePaging or DataBinding. You can fetch data via scrolling the vertical scroll bar on client side.

Please try the following lines to load your excel file:

C#

if (!IsPostBack)
{
GridWeb1.EnableAsync = true;
GridWeb1.AutoExtendMaxRowColumn = false;

string pathinfo = Request.PathInfo;

if (pathinfo.StartsWith("/"))
pathinfo = pathinfo.Substring(1);

if (pathinfo != “acw_ajax_call”)
{
GridWeb1.WebWorksheets.Clear();
GridWeb1.WebWorksheets.ImportExcelFile(@“c:\excel\800+Entity.xls”);
return;
}
}

Please update the dll and update acwmain.js into /acw_client virtual directory.
47

Hi,
I’ve tested the latest version Aspose.Cells.GridWeb v2.5.3.2001 in the attached project. It works nice now for big files though the CPU/Memory usage goes incredibly high for the W3P process while loading big files. But one burning issue returns which I solved before with the help of GridWeb client side API.

Issue Details: After loading an excel file in the grid, when a user is in editing mode in a cell, user clicks on a postback button, at the button postback event the edited data isn’t available. But after editing if the user press tab to navigate to adjacent cell and then press the button, the data is available.
Button Code:
<asp:Button ID=“btnSave” runat=“server” Text=“Save” OnClientClick=“UpdateGridData();” OnClick=“btnSave_Click” />

I solved the above issue by introducing the UpdateGridData() JS function:
function UpdateGridData() {
// get the grid
var grid = GetGrid();
if (grid) {
grid.updateData(false);
grid.validateAll();
}
}

It works fine with the older version Aspose.Cells.GridWeb+v2.5.0.2002. But it doesn’t with the latest version.

Please help urgent.

Thanks.
Wahid


48

Hi,

Thanks for reporting the problem.

I have logged your problem and comment in our database. We will fix it asap.

This issue has been logged as CELLSNET-28227.

Please also test it on latest version Aspose.Cells.GridWeb v2.5.3.2005 and let us know your feedback.

49

Hi,

The updateData() updates data asynchronously when using EnableAJAX.

The btnSave_Click postback event is fired early than updateData() on server side. So, we have to invoke updataData() synchronously on client side. The issue is resolved now.

Please modify ‘btnSave’ tag as:

ASP.NET

<!–[if gte mso 9]>
<w:WordDocument>
<w:View>Normal</w:View>
<w:Zoom>0</w:Zoom>
<w:TrackMoves/>
<w:TrackFormatting/>
<w:PunctuationKerning/>
<w:ValidateAgainstSchemas/>
<w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>
<w:IgnoreMixedContent>false</w:IgnoreMixedContent>
<w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>
<w:DoNotPromoteQF/>
<w:LidThemeOther>EN-US</w:LidThemeOther>
<w:LidThemeAsian>X-NONE</w:LidThemeAsian>
<w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript>
<w:Compatibility>
<w:BreakWrappedTables/>
<w:SnapToGridInCell/>
<w:WrapTextWithPunct/>
<w:UseAsianBreakRules/>
<w:DontGrowAutofit/>
<w:SplitPgBreakAndParaMark/>
<w:EnableOpenTypeKerning/>
<w:DontFlipMirrorIndents/>
<w:OverrideTableStyleHps/>
</w:Compatibility>
<m:mathPr>
<m:mathFont m:val=“Cambria Math”/>
<m:brkBin m:val=“before”/>
<m:brkBinSub m:val="–"/>
<m:smallFrac m:val=“off”/>
<m:dispDef/>
<m:lMargin m:val=“0”/>
<m:rMargin m:val=“0”/>
<m:defJc m:val=“centerGroup”/>
<m:wrapIndent m:val=“1440”/>
<m:intLim m:val=“subSup”/>
<m:naryLim m:val=“undOvr”/>
</m:mathPr></w:WordDocument>
<![endif]–><!–[if gte mso 10]> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

<![endif]–>


<asp:LinkButton runat="server" ID="btnSave" style="display:none;" OnClick="btnSave_Click"></asp:LinkButton>


<input type="button" value="Save" onclick="UpdateGridData();">



And modify ‘UpdateGridData’ function as:

function UpdateGridData() {


var grid = GetGrid();


if (grid) {

var acp = grid.ajaxcallpath;


grid.ajaxcallpath = null; // disable EnableAJAX


grid.updateData(false);


grid.validateAll();


var btnSave = document.getElementById(“ctl00_mainContent_btnSave”);


btnSave.click();


grid.ajaxcallpath = acp; // restore EnableAJAX

} //if

}//Update

50

The issues you have found earlier (filed as 26523) have been fixed in this update.

This message was posted using Notification2Forum from Downloads module by aspose.notifier.
51

Hi,
It’s been long time since I post last. I’m currently using aspose.cells.gridweb licensed version 2.5.3.2001. Receiving some constant complains from our client:

  1. The page is too heavy due to the components script files even though the size of the excel is very small.
  2. Doesn’t works well in ajax mode and its buggy.
  3. Selecting one cell and then start editing, it doesn’t take the first key stroke as its for entering the cursor to the cell.

and few others…

I downloaded the latest trial version 2.7.6.2000. Is there any massive improvement on the latest build regarding the point mentioned above? If so I’m planning to buy the license ASAP.

Thanks.

Wahid

52

Hi,

Thanks for your posting.

We have fixed some of reported bugs which we will publish in a release notes when we will release a major version.

However, I will strongly recommend you to download and try the current latest version:
Aspose.Cells
for GridWeb v2.7.6.2003

Let us know your feedback.

53
wahid.choudhury:
Hi,
I'm now testing the new version you suggested. But I've one important query. GridWeb.ModifiedCells contains a collection of WebCell. Is there any way to get the corresponding sheet name of the modified webcell?

Thanks.
Wahid
Hi,

Please download and use the latest version: Aspose.Cells for GridWeb v2.7.7.2002

Please refer to this thread.
Is there any way to get the corresponding sheet name of the modified webcell?

For your newer issues, please create newer thread.
54

Hi,
The latest version doesn’t work as it crashes to load a simple excel file.

For “Sheet Name with modified cell (s)”, I didn’t get any solution following link you provided. I need this urgent. Can you help?

Thanks.
Wahid

55

Hi,

The sheet name should be active sheet name of a gridweb control e.g

GridWeb1.WebWorksheets.ActiveSheet.Name

56

Hi,
Thanks. Modified cells problem solved. Now I need a link to latest stable release of the component. Also please provide the latest acw_client folder with latest scripts. After having a quick look I’m going to buy the license.

Thanks.
Wahid

57

Hi,

That’s good to know your problem is resolved.

Please download the latest release from this link:
Aspose.Cells
for GridWeb v2.7.7.2002


It also contains the latest acw_client with latest script.

58

Hi,
I’m still facing following problem while trying to import the attached excel file:
Message: Exception type: System.InvalidOperationException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Exception message: Failed to compare two elements in the array.
Inner exception 1 type: System.ArgumentException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Inner exception 1 message: Object must be the same type as the enum. The type passed in was ‘System.String’; the enum type was ‘?.?’.
Stacktrace: at System.Array.BinarySearch(Array array, Int32 index, Int32 length, Object value, IComparer comparer)
at System.Collections.SortedList.IndexOfKey(Object key)
at System.Collections.SortedList.get_Item(Object key)
at Aspose.Cells.GridWeb.Data.WebWorksheets.?(Boolean )
at ?.?.?(WebWorksheets )
at Aspose.Cells.GridWeb.Data.WebWorksheets.ImportExcelFile(String fileName)
at UsingAsposeGrid._Default.LoadDefaultGrid() in D:\Projects\My Projects\UsingAsposeGrid\UsingAsposeGrid\Default.aspx.cs:line 80
Class: UsingAsposeGrid._Default
Method: LoadDefaultGrid
LineNumber: 80
StackTrace: at mr.util.logging.InlineProfiler.GetExtendedPropertiesForException(Boolean appendStackTrace) in D:\Projects\My Projects\UsingAsposeGrid\mr.util\logging\InlineProfiler.cs:line 320
at mr.util.logging.InlineProfiler.WriteException(Exception exception, String[] categories) in D:\Projects\My Projects\UsingAsposeGrid\mr.util\logging\InlineProfiler.cs:line 200
at mr.util.logging.LogHelper.WriteException(Exception exception, String[] categories) in D:\Projects\My Projects\UsingAsposeGrid\mr.util\logging\LogHelper.cs:line 105
at UsingAsposeGrid._Default.LoadDefaultGrid() in D:\Projects\My Projects\UsingAsposeGrid\UsingAsposeGrid\Default.aspx.cs:line 80
at UsingAsposeGrid._Default.Page_Load(Object sender, EventArgs e) in D:\Projects\My Projects\UsingAsposeGrid\UsingAsposeGrid\Default.aspx.cs:line 36
at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.default_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\usingasposegrid\d28813f0\b2fd3b43\App_Web_vvg9navh.0.cs:line 0
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)
at System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb)
at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)
at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr managedHttpContext, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)

Am I missing anything?
Thanks.
Wahid

59

Hi,

Thanks for your reporting a problem.

I was able to replicate this problem using the latest version.

We have logged this issue in our database. We will look into this issue and once the issue is resolved or we have some other update for you, we will let you know asap.

This issue has been logged as CELLSNET-40786.

Below is a code and screenshot for a reference.

C#


string filePath = @“F:\Shak-Data-RW\Downloads\Book1.xlsx”;


this.GridWeb1.WebWorksheets.ImportExcelFile(filePath);


Screenshot:
60

Hi,


Please try our previous fix v2.7.7.2001, it works fine with your file and is stable version.

In the mean time, we will continue to test/evaluate the latest fix v2.7.7.2002 to fix your issue and other elements (already logged ticket(s)).

Thank you.
61

Hi,
Can you provide me the link to buy the license? The old license which I was using for GridWeb_Version_2.5.3.2001. And it worked for Aspose.Cells_Version_5.1.4.0 component also. Should the new license will work for the cells component also?

Thanks.
Wahid

62

Hi,

Thanks for your posting and using Aspose.

Please contact Aspose.Purchase for purchasing license.

If your license date has not expired, then you can use the new component without any problem.

License date expires after 1 year from the date of your purchase. You can check the license expiry date by opening your license in a notepad.

But if your license date has expired, you will have to renew your license subscription.